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riscv: hwprobe: export Zvfh[min] ISA extensions 

Export Zvfh[min] ISA extension[1] through hwprobe.

Link: https://drive.google.com/file/d/1_Yt60HGAf1r1hx7JnsIptw0sqkBd9BQ8/view [1]
Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Evan Green <evan@rivosinc.com>
Link: https://lore.kernel.org/r/20231114141256.126749-17-cleger@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Clément Léger 2023-11-14 09:12:52 -05:00 committed by Palmer Dabbelt
parent f4961b78c3
commit 5dadda5e6a
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3 changed files with 12 additions and 0 deletions
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8
Documentation/arch/riscv/hwprobe.rst
View File

@ -149,6 +149,14 @@ The following keys are defined:
* :c:macro:`RISCV_HWPROBE_EXT_ZIHINTNTL`: The Zihintntl extension version 1.0
is supported as defined in the RISC-V ISA manual.
* :c:macro:`RISCV_HWPROBE_EXT_ZVFH`: The Zvfh extension is supported as
defined in the RISC-V Vector manual starting from commit e2ccd0548d6c
("Remove draft warnings from Zvfh[min]").
* :c:macro:`RISCV_HWPROBE_EXT_ZVFHMIN`: The Zvfhmin extension is supported as
defined in the RISC-V Vector manual starting from commit e2ccd0548d6c
("Remove draft warnings from Zvfh[min]").
* :c:macro:`RISCV_HWPROBE_KEY_CPUPERF_0`: A bitmask that contains performance
information about the selected set of processors.

2
arch/riscv/include/uapi/asm/hwprobe.h
View File

@ -53,6 +53,8 @@ struct riscv_hwprobe {
#define RISCV_HWPROBE_EXT_ZFH (1 << 27)
#define RISCV_HWPROBE_EXT_ZFHMIN (1 << 28)
#define RISCV_HWPROBE_EXT_ZIHINTNTL (1 << 29)
#define RISCV_HWPROBE_EXT_ZVFH (1 << 30)
#define RISCV_HWPROBE_EXT_ZVFHMIN (1 << 31)
#define RISCV_HWPROBE_KEY_CPUPERF_0 5
#define RISCV_HWPROBE_MISALIGNED_UNKNOWN (0 << 0)
#define RISCV_HWPROBE_MISALIGNED_EMULATED (1 << 0)

2
arch/riscv/kernel/sys_riscv.c
View File

@ -186,6 +186,8 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
EXT_KEY(ZVKSED);
EXT_KEY(ZVKSH);
EXT_KEY(ZVKT);
EXT_KEY(ZVFH);
EXT_KEY(ZVFHMIN);
}
if (has_fpu()) {